Canker sores are not contagious and are not related to the herpes simplex virus, also known as cold sores. Canker sores are thought to be caused by: Injuries to the mouth, as seen frequently by contact sports players. Accidentally biting the inside of the cheek or lip may also result in a canker sore.
Mexico has a population of 112,468,855 (July 2010 estimate) and its capital and largest city is Mexico City. Mexico is divided into 32 federal entities, of which 31 are states and one is a federal district. The following is a list of Mexico's 31 states and one federal district arranged by area. The population (as of 2009) and capital of each have also been included for reference.
Mexico City, or the City of Mexico, is the capital of Mexico and the most populous city in North America. Mexico City is one of the most important cultural and financial centers in the Americas. It is located in the Valley of Mexico, a large valley in the high plateaus at the center of Mexico, at an altitude of 2,240 metres. The city consists of sixteen boroughs. The 2009 estimated population for the city proper was approximately 8.84 million people, with a land area of 1,485 square kilometres.